Hi ZeN,

If you are considering the M80s, the Denon receivers will drive them, as will the H/K 8000, 7200, and AVR525 (I'm using the latter at the moment, and it's fine with the M80s).

The Onkyos are not stable into 4 ohms (they'll shut down or severely limit output power) and the Yamahas are iffy because some of them have a 4-ohm switch that limits their output power into 4 ohms.

As to Sony ES, I've heard they are good quality, but I don't know anyone who uses one.

Regards,

Alan Lofft,
Axiom Resident Expert (Retired)